Europlanet Science Congress 2022
Palacio de Congresos de Granada, Spain
18 – 23 September 2022
Europlanet Science Congress 2022
Palacio de Congresos de Granada, Spain
18 September – 23 September 2022
EPSC Abstracts
Vol. 16, EPSC2022-741, 2022, updated on 16 May 2023
Europlanet Science Congress 2022
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Closed Fluxtubes and Proton Conics in Jupiter’s Polar Cap

Jamey Szalay1, George Clark2, George Livadiotis1, David McComas1, Don Mitchell2, Jamie Rankin1, Ali Sulaiman3, Frederic Allegrini4,5, Fran Bagenal6, Rob Ebert4,5, Randy Gladstone4, Bill Kurth3, Barry Mauk2, Phil Valek4, Rob Wilson6, and Scott Bolton4
Jamey Szalay et al.
  • 1Princeton University, Astrophysical Sciences, Princeton, United States of America (
  • 2The Johns Hopkins University Applied Physics Laboratory, Maryland, USA
  • 3University of Iowa, Iowa, USA
  • 4Southwest Research Institute, San Antonio, Texas, USA
  • 5Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas, USA
  • 6Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, Colorado, USA

We present a discrete observation of diverse plasma populations and evidence of closed magnetic topology at Jupiter’s polar cap. Two distinct populations of protons are observed over Jupiter’s southern polar cap: a ~1 keV core population and ~1-300 keV dispersive conic population at 6-7 Jovian radii planetocentric distance. We find the 1 keV core protons are likely the seed population for the higher-energy dispersive conics. Transient wave-particle heating in a “pressure-cooker” process is likely responsible for this proton acceleration. The plasma characteristics and composition during this period show Jupiter's polar-most field lines can be topologically closed, with conjugate magnetic footpoints connected to both hemispheres. Finally, these observations demonstrate energetic protons can be accelerated into Jupiter's magnetotail via wave-particle coupling.

How to cite: Szalay, J., Clark, G., Livadiotis, G., McComas, D., Mitchell, D., Rankin, J., Sulaiman, A., Allegrini, F., Bagenal, F., Ebert, R., Gladstone, R., Kurth, B., Mauk, B., Valek, P., Wilson, R., and Bolton, S.: Closed Fluxtubes and Proton Conics in Jupiter’s Polar Cap, Europlanet Science Congress 2022, Granada, Spain, 18–23 Sep 2022, EPSC2022-741,, 2022.


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